2453021 has 4 divisors (see below), whose sum is σ = 2510112. Its totient is φ = 2395932.

The previous prime is 2452963. The next prime is 2453027. The reversal of 2453021 is 1203542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1203542 = 2 ⋅601771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2453021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2453027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28481 + ... + 28566.

It is an arithmetic number, because the mean of its divisors is an integer number (627528).

2^2453021 is an apocalyptic number.

It is an amenable number.

2453021 is a deficient number, since it is larger than the sum of its proper divisors (57091).

2453021 is an equidigital number, since it uses as much as digits as its factorization.

2453021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57090.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2453021 is about 1566.2123100014. The cubic root of 2453021 is about 134.8653618808.

Adding to 2453021 its reverse (1203542), we get a palindrome (3656563).

The spelling of 2453021 in words is "two million, four hundred fifty-three thousand, twenty-one".